Power-lift plow



1924. Jan A. s. KROTZ POWER LIFT PLO W Filed Dec. 8, 1920 3 Sheeos-Sheet1 /l law Jan. 8 1924. 1,480,273

A. S. KROTZ POWER LIFT PLOW Filed Dec. 8, 1920 3 Sheets-Sheet 2awe/W501,

lafuaro If r012 Jan. 8 J

A. s. KROTZ POWER LIFT PLOW Fild Dec. 8,

1920 s Sheets-Sheet 5" Patented Jan. 8, 1924.

1,480,273 UNITED STATES Par-Eur OFFICE.

ALVARO s. Knorz, or JnnnsvILLE, Wisconsin, AssIGnon T GENERAL Moronsconrone'rron, or nrzrnorr, r'rr'cnrdnn, A oonronnrron or DELAWARE.

rowan-LIFT PLOW.

Application filed December To all whom it may concern:

Be it known that I, ALvAI-io S. KRoTz, a citizen of the United States,and a resident of Janesville, county of Rock, and State of Wisconsin,have invented certain new and useful Improvements in Power-Lift Plows,of which the following is a full, clear, concise, and exact description,such as will enable others skilled in the art to which the inventionrelates to make and use the same,

reference being made therein to the accompanying drawings, which form apart of this specification.

My invention relates to plows of the wheel by a tractor; andparticularly to plows of the above type which are self lifting, and

wherein means are provided for raising the frame and furrow turningelements by '20 power derived from the tractor or otherv hauling agencywhereby the plow is drawn at the ends of the furrows and when the plowis to be turned about.

The principal object of my invention is to provide a self-lifting orpower lift plow of the general class above referred to and'in whichimproved mechanism is present for supporting the frame and plowingelements thereof when in their lowermost position; which supportingmechanism co-operates to equalize the upward movement of the frame whenthe same is lifted, and insures the return of the frame and plowingelements to a predetermined and fixed position upon the subsequentlowering of the frame and plow bottoms.

A further object of my invention is to provide an improved frame elementor structure for plows of the class above referred to which will besimpler in CODStIHCtlOIl, and

stronger than has heretofore commonly been the case; and in which animproved construction and arrangement of draft frame is present forfacilitating the transmission of the pull exerted by the hauling agencyto and its distribution relative to and throu hout the frame structureof the plow.

further object of my invention is to provide a plow of the type definedin which drawn is connected to and co-operates with certain of thesupporting wheels of the plow in such a manner as to secure a betterfollowing of the plow after the tractor.

A further object of my invention is to supported gang type designed tobe hauled" the draw bar through which the same is s, 1920. Serial Ito429,205.

plow of the type or class inv question.

With the above and other objects of invention in View, my inventionconsistsin the improved self lifting gang plow and sub-, ordinate partsand'features thereof illustrated in the accompanying drawings andhereinafter described and claimed; and in such variations andmodifications thereof, within the scope of the concluding claims, aswill be obvious to those skilled in the art to which my inventionrelates.

Referring now to the drawings wherein the preferred embodiment of myinvention is illustrated: I

Figure 1 is a view showing my improved plow in plan. j

Figure 2 is a view showing the same in side elevation, and as seen froma position at the left hand side thereof; the parts being shown in thepositions w'hieh they assume when the plow is operating to turn furrows.

Figure 3 is a fragmentary view showing certain elements and features ofthe front end of the plow in side elevation, and as seen from a positonat the right hand side thereof. f

Figure 4 is a view showing the method of supporting the discs from themain frame member of the device.

Figure 5 is a view showing certain details of the draft mechanism at thefront end of the plow and through force is communicated thereto to drawthe same. i I

In the drawings, the reference numeral 10 designates the main framemember of the plow the same I extending longitudinally fromthe front tothe rear end of the plow and being arranged diagonally relative to thedirection of travel thereof, and serving as a support for a plurality offurrow turning elements shown as discs 11 dis osedone in frontofanother; although plow bottoms of the mold board and share type may besecured to and carried by the said frame member or beam if desired. Saidframe;

ember is bent at an acute angle to provide av transversely extendingportion 12 at the front end thereof; and a transversely eittending draftmember or frame is secured to said front end; said draft framecomprising a horizontal portion 13 extending substantially parallel withthe bent in portion 12 and having a plurality of holes, so that the rearend of a draw bar 14 may be adjustably positioned along the same tosecure the proper following of the plow after a tractor or other draftdevice. Said draft frame is provided also with an upwardly extending arm15 at the right hand or outer end 1 thereof the extremity of which isfixedly secured to the main frame bar 10 as by means of a suitablebracket 16; and with an arm 17 extending upward from the left hand orinner end thereof above the level of the frame member 10 and bentoutward, as at 18, to provide a support for a bracket 19 which serves asa support for a member of certain adjusting mechanism, as willhereinafter appear, all as best shown in Figure 5 of the drawing.

The arm 17 and the inner free end of the transversely extending portion12 of the main frame bar or beam 10 are secured to gether through and bymeans of a suitable bracket 20, which carries a bearing 21 forsupporting the inner end of an oscillating shaft concerned with thelifting of the main frame bar and the plows carried thereby, upward, aswill hereinafter appear; and a longitudinally disposed brace bar 22 hasits forward end connected with the bracket 20 and end of the frame bar10 and its rear end fixedly securedto said bar adjacent the middlethereof, to thereby strengthen the frame and to properly distribute thepull transmitted thereto from the tractor whereby the plow is drawn.

Secured to the frame bar 10 intermediate its, length and extendinglaterally therefrom is an angular bracket or support 23 to which issecured, as through a saddle plate 2a or otherwise, an auxiliary framewhereby the lifting mechanism for the bar 10 and the discs or plowbottoms 11 carried thereby is carried, which lifting mechanism will behereinafter described in detail.

The front furrow wheel 25 of my improved plow is rotatableupon anoutwardly bent arm at the lower end of a vertically disposed supportingshaft 26, which is movable angularly about its axis within a verticallydisposed bearing provided in a supporting bracket 27 secured to thefront of and at the right hand side of the plow; said bracket beingshown as secured to the transversely extending portion 12 of the framebar 10- and the same sliding up and down the said shaft 26 as the plowbottoms are raised and lowered. Similarly, the rear furrow wheel 28 issupported from the lower end of a vertically disposed furrow wheel shaftor axle 29 which is capable of oscillating movement within a bearingprovided for it in a bracket 30 secured to the rear end of the plowsupporting bar 10, and

offset relative to said bar; the bracket being slidable vertically uponthe shaft the same 1 as in the case of the front furrow wheel.

hixedly secured to-the upper end of the which extends inward toward thelongitudinal center line of the plow, and the upper end of the rearfurrow wheel shaft 29is provided with a similar but outwardly extendingarm 32. These arms are fast upon the pivotally connected with saidextremities;

and adjustable as to length as by the provision of a sleeve connectionat 34:.

A forwardly extending arm 35 is fixedly secured relative to the forwardfurrow wheelshaft 26, preferably adjacent the lower end thereof, and thefree end of this last mentioned arm is connected with the draw,

bar 14: through and by means of a link 36 the effective length of whichmay be ad justed as by the provision of an adjustable joint between thetwo parts thereof, as indicated by the reference numeral 87; from,

which it follows that movement of the draw bar from side to side aboutthe pivotal connection between its rear .end and the transverse bar 13of the draft frame will be communioated to the shaft of the front furrowwheel through the link. 86 and arm 35, and from said shaft to the rearfurrow wheel shaft through the arm 81, the rod 33 and the arm 32; thefurrow wheel shafts being moved angularly and in opposite directionsabout their respective axes, as will be appreciated. The effect of thelinkage through which said axles" are oscillated is to secure movementof said axles simultaneously with and proportionate to the sidewisemove-v ment of the draw bar, and a consequent better following of theplow as a wholeafter the tractor assume to be used for hauling the same.

Pivotally supported adjacent the rear fur-- row wheel 28 as at 38 uponan arm 39 carried by the bracket 30 which supports the shaft 29 of saidwheel, as aforesaid. is a bell crank lever one arm to of which extendsforward from said pivot, and the other arm 41 of which extends. upwardtherefrom. The forwardly extending arm 40 of said lever is pivotallyconnected with the lower end of a supporting rod 42 which is threaded atits upper end and extends loosely through a passage in a lug 43 fastuponthe of two nuts while the upper end of the other arm 41 of said bellcrank lever is piv- '70 front furrow wheel shaft 26 is an arm 31 upperend of the shaft 29, said threaded end being adjustable in said passageby means Minera ried by c a U-shaped' auxiliary frame l8- This auxiliaryframe 48 is supported from the frame bar lO through the bracket" andsaddle plate 24 as above explained and serves as a support for'thelifting mechanism of the plow, the lifting force -being' communicated tothe supporting bar 10' through said frame and through the bracket 23. r

The lifting shaft 47 is bent to provide a forwardly extending anddownwardly in clined arm 49 the lower end of whichis bent inward toprovide a crank axle 50 upon which a ground wheel 51 is freelyrotatable, and whereby the lifting of the beam 10 and of the discs 01'plow bottoms carried thereby is effected at the will of the operator, as

will hereinafter appear.

Fixedly secured to the inner end: of'the oscillating lifting shaft 47 isan upwardly extending arm 52; and 53 designates a link the rear end ofwhich is pivotally connected with the upper end of said arm '52, and theforward end of which is pivotally connected with the upper end of an arm54 fast upon a transversely disposed oscillating'shaft .55 located atthe front end of the plow, and supported in bearings carried by thebrackets 20 and 27 in the embodimentof my invention illustrated. Theright hand end of this shaft 55 is provided with a forwardly extendingarm or crank 56 the extremity of which is pivotally connected with thelower end of a stirrup or link '57.

An adjusting crank 58 is rotatably supported by an abutment 59 fixedlysecured at the upper end of the front furrow wheel shaft 26. said crankhaving a threaded shank portion 60 which is in threaded engagement withthe upper end of the stirrup or link 57 and the reference numeral 61.see Figure 3, designates a spring under tension and the force of whichacts normally to hold the parts in the positions in which they areshown, with the discs 11 or equivalent plow bottoms down and in thefurrows or, as otherwise expressed to oppose upward movement of theplowing elements; the-rear end of said spring being secured tothe arm ofthe oscillatingvshaft 47 and the front end thereof being secured toa.:fixed :abutment in the embodiment of my invention illustrated.

When the plow is in operation the weight of the frame and parts carriedthereby, the downward pull or sSllCt-iOH due to the resistanceencountered by the furrowturning elements in the plowing operation, andthe action of the spring 61 when the same is employed act together tohold the discs or equivalent elements and: the *frame -in the lowermostposition in which it is shown in Figure-2, the plow-being supportedforthe most-part by the front and rear furrow wheels; the land wheel,however, bearing suflic'ient --weight to I insure the driving thereof bycontact with the unplowedland and the lifting of the frame at the-willof the operator. There are, however, no abutme'nts upon-the furrow wheelshafts for supporting the framebar 10 in its lowermost position; therear end of the frame being supported'from the shaft 29 through theabutment '43, the rod 42 and bell crank being supported from the shaft26 through the abutment 59, the adjusting crank '58, the link 57 and thetransverse shaft 55.

Such being the case,- and the linkage act toward and in opposition toone another throughthe link 53. Theframe is thus supported from thefurrow wheel shafts at the two ends thereof through link mechanism vwhich is normal-lyin 'equilibriu'm,-and the stresses throughout whichare balanced through the oscillating lifting shaft 47.

It therefore follows that the entire plow structure is supported fromthe upper ends of the front'and rear furrow wheel shafts through thelink mechanism as distinguished from by means of abutments upon the saidshafts upon'which the frame rests, as has heretofore commonly been thecase; that the lowermost position of the frame and plowing elements isdetermined entirely by said link elements of said mechanism; and thatthe frame and plows after having been lifted returnto a positiondetermined entirely by the adjustment of said link mechanism upon thesubsequent lowering of the frame.

The front furrow wheel end or corner of the frame may be adjustedvertically and the plow levelled relative to the land wheel to secure auniform eral furrows turned by 'lating the adjusting crank 58; the rearend .of the frame having been initially adjusted to secure a proper;normal depth of the furrows by means ofthe nuts 44,44 upon thesupporting rod 42. This adjustment of the lever 40, 41, and the frontend of the frame depth of the sevproperly manipurear furrow wheel willthereafter need to be made but seldom, as the rear adjustment havingbeen made with a certain depth of furrow in view a uniform depth of allthe furrows may be readily secured by manipulating the adjusting crank58 at the front end of the plow; while a simultaneous change in depth ofall the furrows is provided for by mechanism to-be hereinafter,described in detail. I

The mechanism for lifting the frame in its entirety and the discscarried thereby comprises a clutch drum 62 secured to and rotating withthe land wheel 51; a clutch plate 63 loose uponthe land wheel axle anddisposed adjacent said clutch drum; and clutch mechanism controlled by alever 64.- pivotally supported at the free end of an arm 65 carried bythe lifting shaft 47, and operable by a rope extending to the haulingtractor, and which clutch mechanism is adapted to secure the locking ofthe clutch plateand clutch drum together and the driving of the platefrom the drum and land wheel throughout successive half rotations, andthe locking of the plate in fixed positions at the ends of its movementsto thereby hold the frame in both its-uppermost and lowermost positions;such clutch mechanism, however, not being shown in detail as the samemay be of various forms such, for example, as of the form shown ineither oftwo applications for patent filed by ine upon the 8th day ofDecember, 1920,

= Serial Numbers 429,208 and 429,204.

The clutch plate 63 is provided with a crank pin 67 with which the lowerend of a lifting link 68 is connected; and the upper end of said link ispivotally connected with the free end of the forwardly extending arm 69of a bell crankwhich is pivotally supported at 70 from the auxiliaryframe 4C8 which supports the lifting shaft 4?; so that as successivehalf rotations are imparted to the clutchplate 63 the entire frame,together with the plow bottoms, will be lifted through the link 68 andbell crank lever acting'as a fixed abutment during one half of acomplete rotation from the position shown in Figure 2 into the positionshown in Fig ure 3, and returned to its former or down position duringthe next half rotation. As the frame and plows are lifted the groundwheel swings rearward and communicates "angular movement to the shaft 47throughout an angle determined by the link mechanism whereby the frameis supported from the furrow wheel shafts, as hereinbefore explained,during which lifting operation the link mechanism follows the movementof the lifting shaft and secures uniform upward and downward movement ofthe frame at the front and rear ends of the plow and acts to lift saidends; upward lifting forces being communicated directly to the framethrough the link .68acting upon the bell crank lever, and indirectly tothe two ends thereof through the frame supporting link mechanism, aswill be appreciated. I

In order that the pivotally supported bell crank lever through which thelifting of the plow frame is accomplished may act as a fixedabutment asabove mentioned the second arm 71 thereof is bifurcated and supports atrunnioned sleeve or nut TQbe tween its arms, through which sleeve thethreaded shank: 73 of an adjusting crank 74 extends; the forward end ofsaid crankex tending through a sleeve -75 pivotally supported by thebracket 19 and longitudinal movement of the crank being restrained bysuitable collars thereupon, as shown; from which it follows that thebell crank lever is held in a fixed position as the bracket 19 is,fixedly secured upon and relative to the frame of the plow. The operatormay, however, vary the position of the bell crank lever upon itssupporting pivot and move the frame and plow bottoms carried therebyeither upward or downward by rotating the crank 74, such operationresulting in an adj ustment of the plow as a whole to secure-a greateror less depth of all the furrows turned. During such an adjustment itwill be appreciated that movement is communicated tothe front and rearends of the frame simultaneously, thus maintaining the level of theframe as it is raised or lowered; and that the adjustment to secureuniform depth of all the furrows is in no way disturbed by adjusting'theframe to increase or decrease the depth of the furrows.

The plow discs 11. are dished in form as best shown in the enlargedviewFigure 4, and are supported from the main supporting bar 10 in each caseby two right angular supports 7 6, 77 secured one upon each side thereofand having each anupper horizontal arm extending alongthe bar, and asubstan-. tially vertical arm; the said members being secured to thesupporting barbya bolt 78 located adjacent the bends therein and 9X.tending through registering holes in the bar and disc supportingmembers. The front ends of the arms whichextend along the bar have aplurality of vertically spaced holes through one of which, as regardseachv arm, and a registering hole in the bar a for-. ward securing bolt79 extends;.so that angular disposition of the disc as a wholerelativeto the supporting bar may be varied by causing the bolt 7 9 to extendthrough different pairs of holes 80 in the oppositelylocated rightangular disc supports. The depending arms of the disc supports areobviously spaced apart a distance corresponding with the thickness ofthe bar 10; and the numeral 81 designates a bearing member or. discsupport having a portion lying in be-. tween the lower ends of thedepending arms s unfastened from of the supports 76, 77 and secured inplace by bolts 82, 82 extending through holes in the supports andbrackets and whichbearing bracket is provided with a bearing recess intowhich a ,gudgeon 83 projecting from a disc supporting plate 84: extends,and with in which the same is rotatable; a flange 86 being provided atthe extremity of the disc supporting bracket 81 with which an annularrabbeted holding ring 87 engages to hold the parts together; the ring,the gudg-eon carrying plate andthe disc being held to gether by properlyspaced fastening bolts 88 as will be appreciated.

It will be appreciated that upon removing the supporting brackets 76.,77 which sup port the rear one of the discs 11 the said disc may beremoved from the bar, thus leaving two discs secured to and supported bythe said bar. After thus removing the rear disc the bracket '30 whichsupports the rear furrow wheel 28 may likewise :be the bar and moved up;into the position occupied by the supports which have been removed fromthe bar, the said bracket being then secured to the bar by a bolt whichpasses throughone of the holes provided for the bolts 78, 79 whereby thesupports 76, 77 were secured to the bar. This adjustment of the bracket30 forward along the bar after removing the rearmost disc converts theplow into one having a lesser number of, discs, such adjustment beingprovided for and permitted by the adjustable connections in the linkmembers 33 and 45; the three disc plow illustrated being readilyconvertible into a plow having a smaller number of discs in case theplow is to be used upon ground which is hard to plow, or in cases wherethe power of the hauling tractor is not suflicient to haul the plow whenequipped with all thediscs which it is capable of carrying. When thebracket 30 is thus moved forward on the frame bar it will be seen thatit occupies thesame position relative to the middle one of the discs 11that it occupies in the three disc plow relative to the rearmost of thediscs, thus providing a. l plow in which the balance thereof, and theoperation thereof in its; entirety is the same whether it is providedwith three discs as illustrated, or two ,discs as contemplated in itsconverted form.

Having thus described and explained my invention, I claim and desire tosecure by Letters Patent:

1. In a plow of the class described, a diagonally arranged bar extendingfore and aft of the plow and adapted to support a plurality of furrowturning elements, and the forward end of which is bent inward toward thecenter of the plow a'ndextends transverse to the path of travel thereof;wheels for supporting said bar from the ground; a brace member extendingbetween the inner free endof saidbent in portion and the middle portionof said supporting bar; and draft mechanism connectedwith said inwardlybent *portion and with-:the front end through whichithehplow is drawn.=

2. In a plow ofythe class described, a diagonally arranged bar extendingfore-and aft of the, plow and adapted to support a plurality of, furrowturning elements; and the forward end of which is bent inward toward,the centerflof the plowandextends transverse, to the path.of,;travel,;the1ieof; wheels forsup-porting'said bar fromithe ground; atransversely extending draft frame theends of; which are fixedly securedrelative to, said inwardly bent portion, and through which tractiveforce array-be ap:

plied to the plow'to; draw the; same; and a brace member the forward issecured to the inner end of said bent in portion and to said draftframe,and the rear end of whichvis connected with said supporting bar adjacentthe middle thereof.

3. In a plow of the class described; a diagonally arranged =barextending fore and aft of the plow and adapted to support a plurality offurrow turning elements, and the forward end ofwhich is bent inwardtoward the center of the plow and extends transverse to the path oftravel. thereof; wheels for supporting-said bar from-the ground; atransversely extending .draft frame having a hor'izontalportiondisposedbelow the inwardly bent portion ,of said supporting bar, and upwardlyextending arms at its two ends; a brace- ,memherzextending forwardlyfrom the middle; portion of said supporting 'bar;'means for securing theforward endof said brace member,(the free end of the ben-tqinportion-of: said frame member, wardly ext ding rm o said draft f ame geher; means :for securing the outer of the arms of said draft'rframetothefront end of said sapportingbar.

4:. In a plow of the;.class descrihed; a d ag na ly a a ged ba 4 eend-ing fore and aft of the plownnd adapted to support a p u a ity o furow turn ng e eme ts,- nd the, forward end of ,which is bent: inwardtoward the; center of the iplowand extends transverse to the path wheelsfor supporting said bar from the ground; a tra sversely extending draftframe located at the front end of saidsupporting bar and havinghorizontal portion disposed below the inwardly; bent-portion of saidbar, and upwardlyex ndingarms at itsv two ends; forwardly from {theniddle portion of; said supporting bar; and means fo; r securing saidsupporting bar,-said draftframe and said brace member together -tothereby pro;- vi e unitary an rigid :plew trams of said 'supportinggbarand end of which of travel thereof;

a brace member e t nd ng:

andvythe inner; of the up.-

5. In a plow of the class described, a diagonally arranged bar extendingfore and aft of the plow and adapted to support a plurality of furrowturning elements, and the forward end of which is bent inward toward thecenter of the plow and extends transverse to the path of travel thereof;wheels for supporting said bar from the ground; a transversely extendingdraft frame located at the front end of said supporting bar and having ahorizontal portion disposed below the inwardly bent portion of said bar,and upwardly extending arms at its two ends; a brace member extendingforwardly from the middle portion of said supporting bar; means forsecuring said supporting bar, said draft frame and said brace membertogether to thereby provide a unitary and rigid plow frame; and abracket support carried by and located at the upper end of the innerofthe arms aforesaid of said draft frame.

6. In a plow of the class described, a diagonally arranged bar extendingfore and aft of the plow and adapted to support a plurality of plowingelements; wheels for supporting said bar from the ground; a transverselyextending draft frame located at the front end of said supporting barand the outer end of which is fixedly secured relative thereto; and abrace member the forward end of which is secured to the inner end ofsaid draft frame, and the rear end of which? is connected with saidsupporting bar adjacent the middle thereof.

7. In a plow of the class described; a diagonally arranged bar extendingfore and aft of the plowand adapted to support a plurality of plowingelements; wheels for supporting said bar from the ground; a transverselyextending draft frame located adjacent the front end of said supportingbar and having a horizontal portion disposed below the level of saidbar, and upwardly extending arms at the two ends thereof; a brace memberextending forwardly from the middle portion of said supporting bar;means whereby the forward end of said brace member is connected with theinner of the upwardly extending arms of said draft frame; and meanswhereby the outer of the arms of said draft frame is connected with thefront end of said supporting bar.

8. In a plow of the class described, a diagonally arranged bar extendingfore and aft of the plow and adapted to support a plurality of plowingelements; wheels for supporting said bar from the ground; a transverselyextending draft frame located at the front end of said supporting barand having a horizontal portion disposed below the level thereof, andupwardly extending arms at its two ends; a brace member extendingforwardly from the middle portion of said supporting bar, and theforward end of which is secured. to the inner of the arms of said draftframe: means for connecting the outer of the ends of said draft framewith the front end of said supporting bar; and a bracket carried by andlocated at the of said draft frame.

9. In a plow of the class described, a diagonally arranged bar extendingfore and aft of the plow and adapted to support a bracket andoperatively connected with said bar, said lifting mechanism includingaland wheel operated by engagement with the ground.

10. In a plow of the class described, a diagonally arranged barextending fore and aft of the plow and adapted to support a plurality ofplowing elements; furrow wheels located at the front and rear ends ofsaid supporting bar; a bracket carried by said bar and extendinglaterally therefrom; an auxiliary frame carried by said bracket; a landwheel supported by said auxiliary frame, and lifting mechanism operatedby said land wheel and whereby said bar may be lifted.

11. In a plow of the class described, a longitudinally extendingsupporting bar; a disc supporting member right angular in form andhaving an upper arm extending along said bar, and a depending arm; adisc supporting bracket carried by the lower end of said depending arm;a securing bolt extending through said disc supporting member andsupporting bar adjacent the bend in said disc supporting member; andmeans for securing the free forward end of the upper arm of said discsupporting member to said supporting bar in various positions, tothereby vary the adjustment of the disc supported by said discsupporting member.

12. In a plow of the class described a longitudinally extendingsupporting bar; a disc supporting member having an upper arm extendingalong said bar, and a depending arm; a disc supporting bracket securedto the lower end of said depending arm; a securing bolt extendingthrough said disc supporting member and supporting bar adjacent the bendin said disc supporting member; and a securing bolt extendingthroughsaid supporting barand one of a plurality of vertically spaced holesadjacent the free forward end of the upper arm of said disc supportingmember.

13. In a plow of the class described, a.

upper end of the inner of the arms aforesaid longitudinally extendingsupporting bar; a disc supporting member having an upper arm extendingalong said bar, and a depending arm; securing means for fastening theupper arm aforesaid to said bar; a disc supporting bracket secured tothe lower end of said depending arm and having a bearing recess, and anoutwardly extending flange surrounding said recess; a disc supportingplate having a gudgeon rotatable in said recess; a holding ring engagingsaid flange and resting upon said disc supporting plate; a disc carriedby said disc supporting plate; and bolts extending through said disc,said disc supporting plate and said holding ring for securing said partstogether.

14. In a plow of the class described, a suitable supporting frame; adisc supporting member carried by said frame and having a depending arm;a disc supporting bracket secured to the lower end of said arm andhaving a bearing recess, and an outwardly extending flange surroundingsaid recess; a disc supporting plate having a gudgeon rotatable in saidrecess; a holding ring engaging said flange; a disc carried by said discsupporting plate; and means for securing said disc, said disc supportingplate and said holding ring together.

15. In a plow of the class described, a

diagonally arranged and vertically movable bar extending fore and aft ofthe plow and provided with a plurality of supporting devicesdetachablysecured thereto; a furrow turning element carried by each of saidsupporting devices; a rear furrow wheel bracket adjustable along saidbar; a rear furrow wheel carried by said bracket; a forward furrow wheelsupported from said bar adj acent the forward end thereof; and liftingmechanism whereby said bar may be moved vertically relative to saidfurrow wheels.

16. In a plow of the class described, a diagonally arranged supportingbar extending fore and aft of the plow; a plurality of supportingdevices spaced along and removable from said bar; a plurality of furrowturning elements carried one by each of said supporting devices; a rearfurrow wheel bracket; means whereby said bracket may be secured in aplurality of positions upon said bar; a front furrow wheel bracketcarried by said bar; and two furrow wheels one supported by said frontfurrow wheel bracket and the other by said rearvfurrow wheel bracket.

In testimony whereof I afliX my signature.

ALVARO S. KROTZ.

